Indicate Which Item in the Top Column Best Describes the Item

Indicate which item in the top column best describes the item in the bottom column by writing the appropriate letter in the blank.
$\begin{array}{lr}&\text { enzyme for carbohydrate digestion that functions }\\\text { 1. Trypsin(ogen) }&\text { primarily in the body of the stomach }\_\_\_\\\\\text { 2. } \mathrm{HCl}&\text { first to activate pepsinogen }\_\_\_\\\\\text { 3. Secretin }&\text { stimulates pancreatic acinar cells }\_\_\_\\\\&\text { enzyme for protein digestion secreted by }\\\text { 4. Pyloric gland area } & \text { pancreas }\_\_\_ \\\\\text { 5. Lipase } & \text { enzyme for fat digestion }\_\_\_ \\\\\text { 6. Gastrin } & \text { stimulates parietal and chief cells } \_\_\_\\\\\text { 7. Cholecystokinin } & \text { secreted by chief cells }\_\_\_\\\\\text { 8. Pancreatic acinar }\\\text { cell }&\text { secretes gastrin }\_\_\_\\\\&\text { secreted by duodenal cells in response to the }\\\text { 9. Pepsin(ogen) } &\text { presence of acid }\_\_\_\\\\\text { 10. Aminopeptidase } &\text { secretes pancreatic enzymes }\_\_\_\\\\\text { 11. Salivary amylase } &\text { functions inside brush border }\_\_\_\\\\\text { 12. Pancreatic duct }\\\text { cell }&\text { secretes } \mathrm{NaHCO}_{3}\_\_\_\end{array}$